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Electronics Worksheet: Electronic Components

Electronics lesson 17: Electronic components · Set 440 · 40 questions
TalentJR

Remember (One part, one job): Resistor: limits current. Capacitor: stores a little charge. Diode: one way only. LED: one way and glows. Buzzer: sound. Motor: spinning. Potentiometer: a knob that changes resistance. LDR: light sensor. Thermistor: heat sensor. Fuse: protects by blowing. Transistor: boosts or switches.

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  1. 1.What does an LED do? (a) makes things spin (b) senses how bright it is (c) glows using little power (d) has coloured bands
  2. 2.🧩 Which component makes a beeping sound? (a) resistor (b) fuse (c) motor (d) buzzer
  3. 3.True or false: a fuse blows if current is high. (a) True (b) False
  4. 4.What does a fuse do? (a) smooths a wobbly supply (b) boosts a small signal (c) blows if current is high (d) stores a little charge
  5. 5.🧩 Which component glows using little power? (a) diode (b) capacitor (c) buzzer (d) LED
  6. 6.What does a diode do? (a) smooths a wobbly supply (b) lets current go one way (c) blows if current is high (d) limits the current
  7. 7.🧩 Which component senses how hot it is? (a) diode (b) transistor (c) thermistor (d) LED
  8. 8.True or false: a capacitor smooths a wobbly supply. (a) True (b) False
  9. 9.True or false: a buzzer glows using little power. (a) True (b) False
  10. 10.🧩 Which part changes electrical energy into sound? (a) a capacitor (b) a resistor (c) a diode (d) a buzzer
  11. 11.🧩 A capacitor in a circuit can … (a) make light (b) spin a wheel (c) measure heat (d) store charge briefly
  12. 12.What does a buzzer do? (a) stores a little charge (b) limits the current (c) beeps for an alarm (d) has coloured bands
  13. 13.What does a potentiometer do? (a) stores a little charge (b) turns a fan or wheels (c) blows if current is high (d) is a resistance knob
  14. 14.True or false: a resistor limits the current. (a) False (b) True
  15. 15.True or false: an LDR has coloured bands. (a) False (b) True
  16. 16.🧩 Which component smooths a wobbly supply? (a) transistor (b) LDR (c) capacitor (d) buzzer
  17. 17.🧩 Which component has coloured bands? (a) capacitor (b) LDR (c) fuse (d) resistor
  18. 18.What does a capacitor do? (a) senses how bright it is (b) stores a little charge (c) senses how hot it is (d) turns a fan or wheels
  19. 19.True or false: a motor makes a beeping sound. (a) True (b) False
  20. 20.🧩 Which component beeps for an alarm? (a) motor (b) buzzer (c) resistor (d) LED
  21. 21.True or false: a fuse limits the current. (a) False (b) True
  22. 22.🧩 Which component lets current go one way? (a) transistor (b) diode (c) capacitor (d) potentiometer
  23. 23.🧩 Which part changes electrical energy into movement? (a) an LED (b) a resistor (c) a fuse (d) a motor
  24. 24.What does a resistor do? (a) has coloured bands (b) glows using little power (c) boosts a small signal (d) smooths a wobbly supply
  25. 25.True or false: a transistor boosts a small signal. (a) False (b) True
  26. 26.True or false: a potentiometer is a resistance knob. (a) True (b) False
  27. 27.What does an LDR do? (a) smooths a wobbly supply (b) senses how bright it is (c) has coloured bands (d) beeps for an alarm
  28. 28.What does a capacitor do? (a) smooths a wobbly supply (b) makes a beeping sound (c) limits the current (d) senses how bright it is
  29. 29.🧩 Which component stores a little charge? (a) capacitor (b) LDR (c) potentiometer (d) diode
  30. 30.What does a thermistor do? (a) limits the current (b) smooths a wobbly supply (c) glows using little power (d) senses how hot it is
  31. 31.🧩 Which component senses how bright it is? (a) LDR (b) transistor (c) capacitor (d) fuse
  32. 32.🧩 Which component is a resistance knob? (a) buzzer (b) capacitor (c) potentiometer (d) resistor
  33. 33.What does a buzzer do? (a) stores a little charge (b) is a resistance knob (c) turns a fan or wheels (d) makes a beeping sound
  34. 34.True or false: a motor makes things spin. (a) True (b) False
  35. 35.True or false: a motor lets current go one way. (a) True (b) False
  36. 36.🧩 Which component makes things spin? (a) transistor (b) motor (c) fuse (d) resistor
  37. 37.True or false: a capacitor stores a little charge. (a) False (b) True
  38. 38.🧩 Which component limits the current? (a) transistor (b) diode (c) resistor (d) buzzer
  39. 39.True or false: a buzzer smooths a wobbly supply. (a) True (b) False
  40. 40.True or false: an LED limits the current. (a) False (b) True

Answer key

  1. glows using little power
  2. buzzer
  3. True
  4. blows if current is high
  5. LED
  6. lets current go one way
  7. thermistor
  8. True
  9. False
  10. a buzzer
  11. store charge briefly
  12. beeps for an alarm
  13. is a resistance knob
  14. True
  15. False
  16. capacitor
  17. resistor
  18. stores a little charge
  19. False
  20. buzzer
  21. False
  22. diode
  23. a motor
  24. has coloured bands
  25. True
  26. True
  27. senses how bright it is
  28. smooths a wobbly supply
  29. capacitor
  30. senses how hot it is
  31. LDR
  32. potentiometer
  33. makes a beeping sound
  34. True
  35. False
  36. motor
  37. True
  38. resistor
  39. False
  40. False

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